2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Method B

WARNING: This page is about a different car, the 2005 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
  • Be careful not to scratch or get the fuel hose connection area dirty when servicing, so that the quick connector o-ring maintains sealability.
  • Use Fuel Pressure Gauge Kit J-44321 and Fuel Pressure Gauge Adapter J-44321-6 to check fuel pressure.
  1. Release fuel pressure to zero. Refer to "FUEL PRESSURE RELEASE ".
  2. Remove fuel hose using Quick Connector Release J-45488. Refer to "FUEL INJECTOR AND FUEL TUBE ".
    • Do not twist or kink fuel hose because it is plastic hose.
    • Do not remove fuel hose from quick connector.
    • Keep fuel hose connections clean.
  3. Install Fuel Pressure Gauge Adapter J-44321-6 and Fuel Pressure Gauge (from kit J-44321) as shown in the figure.
    • Do not distort or bend fuel rail tube when installing fuel pressure gauge adapter.
    • When reconnecting fuel hose, check the original fuel hose for damage and abnormality.
      Fig 1: Installing Fuel Pressure Gauge Adapter And Fuel Pressure Gauge
      G03592823Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Turn ignition switch ON (reactivate fuel pump), and check for fuel leakage.
  5. Start engine and check for fuel leakage.
  6. Read the indication of fuel pressure gauge.
    • During fuel pressure check, check for fuel leakage from fuel connection every 3 minutes.

      At idling: Approximately 350 kPa (3.57 kg/cm 2  , 51 psi) 

  7. If result is unsatisfactory, go to next step.
  8. Check the following.
    • Fuel hoses and fuel tubes for clogging
    • Fuel filter for clogging
    • Fuel pump
    • Fuel pressure regulator for clogging

      If OK, replace fuel level sensor unit, fuel filter and fuel pump assembly.

      If NG, repair or replace.

  9. Before disconnecting Fuel Pressure Gauge and Fuel Pressure Gauge Adapter J-44321-6, release fuel pressure to zero. Refer to "FUEL PRESSURE RELEASE "
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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